US3923360A - Multilayer electrical connection panel with modifiable internal circuits - Google Patents

Multilayer electrical connection panel with modifiable internal circuits Download PDF

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Publication number
US3923360A
US3923360A US453901A US45390174A US3923360A US 3923360 A US3923360 A US 3923360A US 453901 A US453901 A US 453901A US 45390174 A US45390174 A US 45390174A US 3923360 A US3923360 A US 3923360A
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Prior art keywords
conductor
conductors
metal
layer
panel
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Expired - Lifetime
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US453901A
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English (en)
Inventor
Maurice Pierre Constant Rougon
Gerald Albert Edmond Davy
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Bull SA
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Bull SA
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1438—Back panels or connecting means therefor; Terminals; Coding means to avoid wrong insertion
    • H05K7/1439—Back panel mother boards
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0286—Programmable, customizable or modifiable circuits
    • H05K1/0292—Programmable, customizable or modifiable circuits having a modifiable lay-out, i.e. adapted for engineering changes or repair
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/0008—Apparatus or processes for manufacturing printed circuits for aligning or positioning of tools relative to the circuit board
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0286—Programmable, customizable or modifiable circuits
    • H05K1/0287—Programmable, customizable or modifiable circuits having an universal lay-out, e.g. pad or land grid patterns or mesh patterns
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
    • H05K1/0298—Multilayer circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/04—Assemblies of printed circuits
    • H05K2201/044—Details of backplane or midplane for mounting orthogonal PCBs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/07—Electric details
    • H05K2201/0707—Shielding
    • H05K2201/0715—Shielding provided by an outer layer of PCB
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/095—Conductive through-holes or vias
    • H05K2201/09609—Via grid, i.e. two-dimensional array of vias or holes in a single plane
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/09745—Recess in conductor, e.g. in pad or in metallic substrate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/17—Post-manufacturing processes
    • H05K2203/175—Configurations of connections suitable for easy deletion, e.g. modifiable circuits or temporary conductors for electroplating; Processes for deleting connections
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/0011—Working of insulating substrates or insulating layers
    • H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
    • H05K3/0047—Drilling of holes

Definitions

  • An electrical connection panel which comprises two parallel conductive plates with at least one layer of conductors sandwiched therebetween and isolated therefrom by insulative material. Connections outer surface of one of the conductive planes is provided with a plurality of depressions disposed perpendicular to edetermined sections of sandwiched conductors. The deany one of the ne] and cutting depressions for drilling through the pa the corresponding section of sandwiched conductor.
  • the invention relates to a multilayer electrical connection panel in which the circuitry of the internal layers may easily be altered.
  • compact circuits which allow the dimensions of such equipment to be considerably reduced.
  • These compact circuits generally take the form of printed circuits which are sometimes grouped together in several layers in electrical connection panels, as well as on detachable boards which may or may not carry electronic components, these boards being able to be plugged into connectors mounted on the connection panels.
  • the electrical links between the various layers of circuitry are generally formed by metal-lined holes running right through the panel, these metal-lined holes also serving as sockets and as connections to which the contacts mounted on the connectors can be soldered.
  • Connection panels are known in which the printed circuits of any one panel are split up into one or more layers which are separated from one another by layers of an insulating material, the assembly formed by these various layers being sandwiched between two conductive plates, the function of which is to supply, via contact elements connected to these plates, two levels of logic voltage to the electronic circuits carried by the boards plugged into the connectors, the printed circuits sandwiched between the plates on the other hand being used to transmit periodic signals exchanged between these electronic circuits.
  • Such connection panels undergo a pressing operation in the course of manufacture, which is intended to bond the insulating layers to each other and to the other layers and the conductive plates, and they are relatively rigid and do not come apart in use.
  • connection panels of this type the printed circuits which are sandwiched between the two conductive plates in any one panel are particularly well protected against the interference which occurs when conductors which are outside the panel but pass close to it transmit high frequency signals having very steep fronts.
  • connection panels it is impossible in such connection panels to gain access to the printed circuits sandwiched between the conductive plates and this constitutes a very serious drawback particularly when certain connections formed by the printed circuits have to be broken or altered, either when the piece of equipment in which the panels are incorporated is being set up, or during operations to permit this piece of equipment to be connected to other pieces of equipment (central units and peripheral members) to which it was not connected originally.
  • the present invention seeks to overcome this drawback and provides a connection panel of the type mentioned above in which the connections formed by the printed circuits inserted between the conductive plates may easily be altered.
  • the invention provides an electrical connection panel which has two parallel conductive plates and a layer of conductors sandwiched between these plates which is isolated therefrom by means of layers of an insulating material, the connections between the conductors in this layer, the said plates, and connecting members external to the panel being formed by means of metal-lined holes which pass through the panel, these metal-lined holes being arranged in regularly spaced rows and columns, each of the conductors in the said layer extending across a section of the layer situated between two consecutive rows of metal-lined holes, the said connection panel being characterised in that, the outer face of one of the conductive plates is assumed to be divided into elementary areas by the rows and columns of metal-lined holes, each of the areas situated between the columns whose positions are respectively 2n and 2n+1, when n assumes successive wholenumber values, is provided with a circular depression arranged perpendicular to the section of conductor situated beneath this area, so as to allow a drilling tool engaged in the depression to be correctly located and guided so as to pierce and cut the said section
  • FIG. I is a partly broken-away perspective view of an assembly incorporating a connection panel formed inaccordance with the invention, which is provided with connectors for printed-circuit boards,
  • FIG. 2 is a plan view of part of the connection panel of the assembly shown in FIG. 1,
  • FIG. 3 is a sectional view along line 33 of FIG. 2, in an area which contains two metal-lined holes which enable the layers to be interconnected,
  • FIG. 4 is a sectional view along line 44 of FIG. 2 in an area which contains a circular depression
  • FIG. 5 is a plan view of another part of the panel associated with the assembly in FIG. 1, showing a particu lar arrangement of the conductors sandwiched between the conductive plates.
  • connection panel 10 on which are mounted connectors 11 intended to have printed-circuit boards 12 plugged into them.
  • the connectors are of the type described and shown in French Pat. No. 1,541,094.
  • each of the .connectors consists of an insulating body provided with at least one set of aligned seatings, each seating being provided with a contact which is arranged to engage with one of of the contact strips formed on opposite sides of one edge of a printed-circuit board which is inserted in the connector.
  • each contact is provided with a shank 13 which is designed to fit into one of the metal-lined holes T in the connecting panel 10.
  • each of the fixing bars is in two parts.
  • bar M is formed from two parts, 14A and 14B
  • bar 15 is made up in a similar way of two parts, 15A and 153.
  • the two parts of each bar are both provided with flanges 16 which are formed in such a way as to be capable of gripping the ends of connectors positioned between two opposing flanges.
  • the metal-lined holes T in the connection panel 10 are lined up so that they form rows and columns, the rows being referenced R R R etc in FIG. 2 and the columns being referenced C C C etc in the same Figure.
  • the metal-lined holes in FIG. 2 have been designated by the reference T followed by two numbers separated by a dot, the first of these two numbers giving the position of the column in which each metal-lined hole is situated and the second number giving the position of the row in which the hole in question is situated.
  • metal-lined hole Tl.3 is situated at the intersection between column C and row R Also shown in FIG.
  • central axes M or the rows of metal-lined holes are the central axes M or the rows of metal-lined holes, these central axes being referred to in this Figure by references M M M etc.
  • central axis M l is situated at the same distance from rows R and R FIG. 3, which is a cross-section, along column C of part of the connection panel shown in FIG. 2 in an area which contains metal-lined holes T0.1 and T0.2, is intended to show how this panel is made up.
  • the makeup of the panel also appears in FIG. 1 where the broken-away portions allow certain details of construction to be seen, as well as in F IG. 4, which is a sectional view along the axis M2 central to the rows R and R of metal-lined holes of the part of the panel which is shown in FIG. 2.
  • connection panel contains two layers 17 and 18 of printed conductors, with layer 17 consisting of a plurality of conductors each designated by the reference 17 followed by a letter, such as 17P, 17Q, 17R etc, and with layer 18 similarly consisting of a plurality of conductors each of which carries a reference 18 followed by a letter, such as 18F, 18G, 18H, etc.
  • the two layers 17 and 18 of conductors are separated frm one another by a layer 19 of an insulating material.
  • FIG. 3 and 4 also show that the connection panel 10 further has two parallel conductive plates 20 and 21 arranged on either side of the assembly formed by layers 17, 18 and 19, the plates being separated from this assembly by means of one mother of the two layers of insulating material 22 and 23.
  • connection panel 10 may contain only a single layer of conductors, such as conductor layer 17, this layer being then sandwiched between the conductive plates 20 and 21 and being isolated from them by layers 22 and 23.
  • the metal-lined holes which pass right through the connection panel, allow either certain of the conductors in different layers to be connected together electrically or these conductors or the conductive plates 20 and 21 to be connected to connectors external to the panel.
  • these external connectors are formed by contacts, the shanks 13 of which are each inserted into one of the metal-lined holes in the panel, each shank being connected in a known way to the metal-lined hole into which it fits by soldering.
  • metal-lined holes in which the shanks are engaged are then isolated from the plates by means of a cutting or engraving operation which is carried out on the plates around each of the holes in question before the fixing bars and connectors are fitted to the connection panel.
  • metal-lined hole T02 is isolated from plates 20 and 21 by cuts made in the plates at 26 and 27 respectively, and connects together two conductors in layers 17 and 18, while metal-lined hole TO.1 is connected only to conductive plate 21.
  • conductive plates 20 and 21 are normally connected to a voltage source (not shown) in order to supply two logic voltages (e.g. 5 volts and 0 volts) t0 the various electronic circuits carried on the printed-circuit boards engaged in the connectors, via contacts connected to the plates.
  • the conductors in layers 17 and 18 are used on the other hand to transmit the electrical signals and pulses received or emitted by various electronic circuits.
  • each of the conductors extends substantially in the same direction as the rows of metallined holes, each conductor, as it extends across the layer of conductors to which it belongs, being confined to an area of the layer situated between two consecutive rows of metal-lined holes.
  • each of the conductors in layers 17 and 18 is in the form of a broken line, certain portions of which coincide with the axis central to the two rows of metal lined holes between which the conductor in question extends.
  • these portions are those which are situated between the columns of metal-lined holes the positions of which are respectively (2n l) and (2n 2), that is to say those which are situated between columns C and C C and C, etc, whereas, in the case of the conductors in layer 18, these portions are those which are situated between the columns of metal-lined holes the positions of which are respectively 2n and (2n 1).
  • the path followed by conductor 183 coincides with the sections of the central axis M situated between columns C and C (where n 0), between columns C and C (where n 1), etc, that is to say, in general terms, those sections which are situated between the columns for which the general references are respectively C and C
  • the connection panel 10 contains only a single layer of conductors sandwiched between conductive plates 20 and 21, and that each of the conductors in this layer (or layers) could be of any configuration whatever, provided only that in the course of its progress across the layer of conductors of which it is part, it remains confined between two consecutive rows of metal-lined holes.
  • FIG. 2 it may also be noted that in the embodiment described, none of the conductors in layer 17 or layer 18 passes through a metal-lined hole along its path. However, any connections required between these conductors and certain metal-lined holes in the connection panel are formed by means of junction conductors which, in FIG. 2, have been given the reference letter J followed by a number. Thus, metal-lined holes T2.2 is linked to conductor 178 by junction conductor J4. Similarly, metal-lined hole T0.2 is linked to conductor 17B by junction conductor J2 and to conductor 188 by conjunction conductor J3, these two junction conductors lying one above the other as shown in FIG. 3. It
  • connection panel the conductors in the various layers could, without difficulty, pass through certain metal-lined holes in the panel and in this case the junction conductor would be dispensed with.
  • FIGS. 1 and 2 it can be seen that the outer face of conductive plate 20 of the connection panel is provided with circular depressions, which are in FIG. 1 are referred to by the general reference E and which, so that they may be differentiated, are designated in FIG. 2 by the reference letter E followed by the two numbers the meaning of which will be explained below. It is assumed, so that the description is easy to understand, that the outer face of plate 20 is divided into units of area by the rows and columns of metal-lined holes, it can be seen from FIG. 2 that each depression is situated within an area which is defined on the one hand by two consecutive rows of metal-lined holes and on the other hand by two consecutive columns of such holes. It can also be seen from FIG.
  • each of the depressions is arranged perpendicularly above a section of a conductor situated beneath the unit area in which the depression is located.
  • the connection panel has two layers of conductors and therefore each area has situated beneath it two sections of conductor belonging to two different layers, it should be borne in mind that, where the connection panel contains only a single layer of conductors sandwiched between plates 20 and 21, each unit of area will then cover only a single section of conductor.
  • depression E2.1 which is situated in the unit area between rows R and R and between columns C and C is arranged, as shown in FIG. 2, perpendicular to the section of conductor 188 which lies between the two columns.
  • depression E3.2 which is situated in the unit area lying between rows R and R and between columns C and C is arranged perpendicular to the section of conductor 17C which lies between columns C and C
  • the connecting panel contains two layers of conductors sandwiched between plates 20 and 21
  • the depressions are made in such a way that they are never situated perpendicular to two sections of conductor belonging to different layers at the same time. This being so, it is possible to ensure that only a single section of conductor runs under each depression.
  • connection panel which may be depression E2.l for example, so as to drill into the panel and thus cut the section of conductor situated beneath this depression, that is to say, in the present case, the section of conductor 18B which is situated between the columns C and C of metal-lined holes.
  • the drill it is necessary for the drill to be of a sufficiently large diameter in comparison with the width of the conductor.
  • the width of the conductors is of the order of 0.6mm
  • this condition is met if a drill is used having a diameter of at least 0.8 mm, the thickness of the connection panel being approximately 2.5 mm.
  • correct guidance was provided in practice for the drill to allow it to cut any one of the conductors when the diameter of the depressions in which the drill was engaged before the drilling operation was between substantially 0.4 times the diameter of the drill and a diameter equal to that of the drill. In the example described, this condition is met by reason of the fact that the diameter of the depressions is substantially equal to 0.5 mm.
  • the depressions with which the conductive plate 20 is provided not only enable the operator to locate accurately the points at which he may drill to cut the con ductors sandwiched between the two plates 20 and 21 but also prevent the drill slipping across plate 20 at the beginning of the drilling operation. Because the drill is held in the correct position relative to the conductor which it is to cut in this way, it cannot fail in the course of its penetration to cut the conductor cleanly.
  • metal-lined hole T2.3 for example, from the conductor 17C to which it is connected by linking conductor J6, it is merely necessary to drill through conductor 17C at points situated perpendicular to depressions 153.2 and E3.4.
  • the effect of this operation is also to break the connection which until then had been provided by conductor 17C between metal-lined holes Tl.2 and T4.3.
  • This connection may, however, easily be restored by using a conductor external to the connection panel and soldering the ends of this conductor to the respective shanks of the contacts plugged into metal-lined holes T1.2 and T4.3 or simply by winding the lead around these shanks.
  • each conductor which extends between two consecutive rows of metal-lined holes it is necessary in the case of each conductor which extends between two consecutive rows of metal-lined holes for there to be at least one depression above each of the sections of this conductor which lie between the points at which the conductor is joined by junction conductors which connect it to the metal-lined holes in the said two rows.
  • a depression E3.2 there is situated a depression E3.2.
  • junction conductors J11 and 112 which connect metal-lined holes T2.8 and T3.8 respectively to conductor 171-! are arranged not so that they lie along the columns C2 and C3 in which these metal-line holes are situated, but so that they meet conductor 17H at points situated perpendicular to depressions E8.2 and BSA.
  • each of the depressions with which the conductor plate is provided is located at the centre of its respective elementary area.
  • depression E2.l in FIG. 2 is situated at the centre of the elementary area defined by columns C and C and by rows R and R
  • each of them has been given a reference letter B followed by two numbers separated by a dot, the first of the numbers corresponding to the position of the central axis on which the depression is situated and the second corresponding to the position of the column which in the drawing, is situated immediately to the right of the said depression.
  • the depressions are all arranged in regularly spaced rows and columns, these two numbers perform the function of an address, which then enables an operator who has been instructed to make modifications to the circuits in the connection panel to find the position of depressions in the panel quickly and with hardly any likelihood of making a mistake.
  • the contact shanks plugged into the metal-lined holes in the connection panel are relatively close to one another and are a considerable hindrance when the drilling tool is brought to bear, the position of each depression at the centre of its respective elementary area makes it easier for the operator to drill into the panel so as to cut the conductors in layers 17 and 18.
  • An electrical connection panel comprising two parallel conductive plates and a layer of conductors which is sandwiched between these plates and isolated from them by means of layers of an insulating material, the connections between the conductors of this layer, the said plates, and connectors external to the panel being produced by means of metal-lined holes extending through the panel, these metal-lined holes being arranged in regularly spaced rows and columns, each of the conductors in the said layer extending across a section of the layer situated between two consecutive rows of metal-lined holes, the said connection panel being characterised in that, the outer face of one of the conductive plates is assumed to be divided into elementary areas by the rows and columns of metal-lined holes, each of the areas situated between the columns the respective positions of which are 2n and 2n 1, when n assumes successive whole-number values, is provided with a circular depression arranged perpendicular to the section of conductor situated beneath this area in order to enable a drilling tool engaged in the depression to be correctly located and guided so as to drill through and cut the said section of conductor
  • connection panel characterised in that, when the conductors in the layer do not pass through the metal-lined holes in the panel, the panel contains junction connectors sandwiched between the conductive plates which are arranged parallel to the said plates and which connect each of the conductors in the layer to at least two metal-lined holes belonging to two consecutive rows between which the conductor extends, the points of intersection between any one conductor in the layer and the junction connectors to which it is linked being so defined that the sections of the said conductor which lie between these points each pass under at least one depression in the connection panel.
  • connection panel characterised in that the path of each conductor in the layer which extends between two consecutive rows of metallined holes coincides with the axis central to these two rows when passing beneath each of the elementary areas provided with a depression, and is at a distance from the said axis when passing beneath each of the other elementary areas.
  • connection panel characterised in that, in each elementary area provided with a depression, the depression is located at the centre of the elementary area.
  • a connection panel characterised in that it further contains a second layer of conductors separate from the first which is sandwiched between the two conductive plates, each of the conductors in the second layer extending across a section of the said layer situated between two consecutive rows of metal-lined holes, and in that, on the outer face of the conductive plate provided with depressions, each of the elementary areas situated between the columns of metal-lined holes the respective positions of which are 2n l and 2n 2, when n assumes successive wholenumber values, is likewise provided with a circular depression situated perpendicular to the section of conductor in the second layer which passes beneath this area, so as to enable a drilling tool engaged in this depression to be in the correct position to drill through and cut this section of conductor when the electrical connection provided by the latter is to be broken.
  • each conductor in the second layer follows a path which, when it passes under each of the elementary areas situated between the columns of metallined holes the respective positions of which are 2n and 2n l, coincides with the axis central to the two rows of holes between which it extends, and which, when it passes beneath each of the other areas is at a distance from this axis, and in that the path followed by each conductor in the second layer coincides with the axis central to the two rows of holes between which it extends beneath each of the elementary areas situated between the columns the respective positions of which are 2n 1 and 2n 2, and is at a distance from this axis beneath each of the other areas.
  • An electrical connection panel comprising two parallel conductive plates and at least one layer of conductors sandwiched between said plates and isolated from them by means of layers of an insulating material, wherein the connections between the conductors, the said plates, and conductors external to the panel are produced by means of metal-lined holes extending through the panel and wherein the outer surface of one of the conductive plates is provided with a plurality of depressions respectively disposed perpendicular to predetermined sections of the said conductors, said depressions being provided for the purpose of locating and guiding a drilling tool which when inserted in any one of the depressions, can drill through the panel and cut the corresponding section of said conductor when it is desired that a conductor shall be broken at this point.
  • metal-lined holes are arranged in regularly spaced rows and columns which serve to define contiguous elementary areas of said outer surface of said conductive plate and wherein conductor sections extend across at least some of said areas and a depression is provided in each of those said areas perpendicular to the associated conductor section where it may be desired to cut said conductor section by a drilling operation.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)
  • Structure Of Printed Boards (AREA)
  • Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
US453901A 1973-03-26 1974-03-22 Multilayer electrical connection panel with modifiable internal circuits Expired - Lifetime US3923360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7310766A FR2223934B1 (fr) 1973-03-26 1973-03-26

Publications (1)

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US3923360A true US3923360A (en) 1975-12-02

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US453901A Expired - Lifetime US3923360A (en) 1973-03-26 1974-03-22 Multilayer electrical connection panel with modifiable internal circuits

Country Status (7)

Country Link
US (1) US3923360A (fr)
JP (1) JPS49128263A (fr)
BR (1) BR7402216D0 (fr)
DE (1) DE2413219A1 (fr)
FR (1) FR2223934B1 (fr)
GB (1) GB1449210A (fr)
IT (1) IT1012131B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477570A (en) * 1981-09-24 1984-10-16 Occidental Chemical Corporation Microbial degradation of obnoxious organic wastes into innocucous materials
US4488354A (en) * 1981-11-16 1984-12-18 Ncr Corporation Method for simulating and testing an integrated circuit chip
EP0191902A1 (fr) * 1985-01-24 1986-08-27 ANT Nachrichtentechnik GmbH Système de structure pour des appareils de la technique d'informations électriques
US4636919A (en) * 1985-03-20 1987-01-13 Hitachi, Ltd. Multilayer printed circuit board
US5044966A (en) * 1989-05-23 1991-09-03 Peter Friesen Electrical panel for physically supporting and electrically connecting electrical components

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951575A1 (de) * 1979-12-21 1981-07-23 Leybold-Heraeus GmbH, 5000 Köln Uebergangselement fuer die elektrische verbindung von baugruppentraegern mit rasterfoermig angeordneten stiftfoermigen anschlusskontakten
US4502098A (en) * 1981-02-10 1985-02-26 Brown David F Circuit assembly
ES277525Y (es) * 1983-03-08 1985-03-01 International Business Machines Corporation Una placa de circuito impreso
DE3514264A1 (de) * 1985-04-19 1986-10-23 Wilhelm Sedlbauer GmbH Fabrik für Feinmechanik und Elektronik, 8000 München Vielfachschaltelement zum verbinden einer mehrzahl von mehrfachbussen
JPS62272586A (ja) * 1986-05-20 1987-11-26 日本電気株式会社 プリント配線板

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US3148438A (en) * 1959-05-25 1964-09-15 Vero Prec Engineering Ltd Method of making wiring boards
US3356786A (en) * 1964-10-07 1967-12-05 Texas Instruments Inc Modular circuit boards
US3516156A (en) * 1967-12-11 1970-06-23 Ibm Circuit package assembly process

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US3148438A (en) * 1959-05-25 1964-09-15 Vero Prec Engineering Ltd Method of making wiring boards
US3356786A (en) * 1964-10-07 1967-12-05 Texas Instruments Inc Modular circuit boards
US3516156A (en) * 1967-12-11 1970-06-23 Ibm Circuit package assembly process

Cited By (5)

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US4477570A (en) * 1981-09-24 1984-10-16 Occidental Chemical Corporation Microbial degradation of obnoxious organic wastes into innocucous materials
US4488354A (en) * 1981-11-16 1984-12-18 Ncr Corporation Method for simulating and testing an integrated circuit chip
EP0191902A1 (fr) * 1985-01-24 1986-08-27 ANT Nachrichtentechnik GmbH Système de structure pour des appareils de la technique d'informations électriques
US4636919A (en) * 1985-03-20 1987-01-13 Hitachi, Ltd. Multilayer printed circuit board
US5044966A (en) * 1989-05-23 1991-09-03 Peter Friesen Electrical panel for physically supporting and electrically connecting electrical components

Also Published As

Publication number Publication date
IT1012131B (it) 1977-03-10
BR7402216D0 (pt) 1974-11-19
GB1449210A (en) 1976-09-15
DE2413219A1 (de) 1974-10-10
FR2223934A1 (fr) 1974-10-25
FR2223934B1 (fr) 1979-01-12
JPS49128263A (fr) 1974-12-09

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